> Those children were more likely to become depressed by age 12 or 13, to be the victims of bullying, to be aggressive, to have lower interpersonal skills, to have unhealthy diets, and to be overweight, the researchers found in the April study.

> The findings suggest that very young children are missing out on key aspects of their brain development when they spend so much time staring at a screen instead of interacting with the outside world.

Or alternatively, they suggest that victims of bullying, less socially successful, and less physically fit children are more inclined to spend time using a screen.

So often studies like this find a correlation, then jump to the causation they had set out to find, ignoring all other plausible relationships suggested by the data.